Power-press.



PATENTED JAN. 16, 1906.

J. E. DOBSON. A POWER PRESS.

APPLIOATIoN FILED JAN. 24, 1905.

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JN VE/VTO, JOH/Y 'E -DOBSON- ment willv cause the lengthening or shortening of the rods by the opposite movement of the 'members a and e upon the right and lelt threaded shanks. Y

With the construction above described whenever it is desire to adjust the platen the clamping-bolts and nuts g and h are rst released, after which the shaft I may be turned,l through the medium of the handle and socket member L, until the required lengthening or shortening of the rods is effected. The clamping-bolts are then-again tightened, so as to prevent further movement of the sections a and e in relation to the shank d.

In this adjustmentthe sections a ande are moved oppositely in relation tothe member G, which latter is held in longitudinally-fixed relation tothe shank by a key d engaging an annular vgroove d2, so that'the length of exposed portions ofthe threaded shank vis divided upon opposite sides of 'the member :G and gear -Wheel H. The latter serves to strengthen the central yportion of the shank,

=and thus'the strength of the rod is greater than it would lbe in a construction where thellengtheningy is -caused by va single threaded shank.

In thev shortest adjustment of the rods F the members a and e abut against shoulders on the memberG and gear-wheel H, so

as to form a continuous full cross-section for v'sustaining the load without throwing any strain upon the threads of the shank. Upon adjusting the rods to lengthen the same and where the press has to be employed for heavy work the rods may be strengthened by inserting shims or washers P between the adj acent faces of the members a and e and the' central members G and H, so as to continue the full cross-section and to relieve the strain Jfrom the' threads. To permit of such adjustment, the adjacent shoulders upon the members G and e and also the adj acent shoulders upon the members H and a are squaretie., perpendicular to the axis of a threaded shank adjustably connecting said sections, the adjacent ends of said sections forming square shoulders adapted to abut against each other and to be parallel when separated, and a shim or washer for insertion betweenv said shoulders to receive the compression stress and to relieve the stress on the threads of the shank.

the shank and parallel with each other. Thus the' 2'. In a press, the combination with the crank and the movable platen, of a rod connecting said crank and platen, formed-in a lplurality of-sections, a threaded shank of -lesser cross-section than said-sections of the rod, engaging central -threaded apertures therein andforming a means of connecting and adjusting said sections toward or from each other, the adjacent faces of said sections being perpendicular to the axis of said shank and rod to form s uare shoulders parallel with each other and1 variable-spacing shims v yor washers for insertion between said shoul` ders to receive the compression stress and re; lieve the same from the threads of said shank.

3. In a press, the combination with the crank-shaft and movable platen, oitl a plurality of rods connecting the cranks' and said platen, each rod comprising a plurality of sections and a central threaded shank adjustably connecting said sections., .a rotary shaft extending between said rods. perpendicular thereto and having bearings-in the central sections of said rods, bevel gearwheels connecting said shaft and the threaded Shanks of said rods and a ratchet connec tion to said shaft for rotating the same tosimultaneously adjust said shanks and correspondingly lengthen or shorten said rods.

4. In a press, the combination with the crank-shaft and movable platen, oi a plurality of rods connecting the. cranks and platen, each comprising a plurality of sections having square abuttingehoulders and a central threaded shank adju-stably connecting said sections, the central sections of said rods projecting laterally toward each other, a shaft perpendicular to said rods journaled in bearings in said extensions of the central members, bevel gear-wheels on said shaftin recesses in said lateral extensions, bevel gearwheels on said shanks intermeshing with said gear-wheels on said shaft and a ratchet connection to said shai't intermediate said lateral extensions for simultaneously rotating said shanks and correspondingly lengthening or shortening said rods.

5. In a press, the combination with the crank-shaft and movable platen, of a plurality of rods connecting the cranks and said platen, each rod comprising three sections, havin square abutting shoulders and a threa ed shank of lesser cross-section centrally connecting said sections, the central section of each rod being in a longitudinallyfixed position. thereon and being provided with a lateral extension, a shaft erpendicular to said rods j ournaledin'sard ateral extensions o the central sections thereof, bevel gear-wheels fixed upon said Shanks adjacent to said central sections and having a hub portion formed with square shoulders for abutting against said sections, bevei gear.-

wheels/ fixed u )on said shaft and locatedin A recesses 1n sai lateral extensions and intel`- ige shanks, the threads on the sections of said rods,

upon said threaded Shanks.

6. In a press,

rality of rods connecting the said rod being sleeved longitudinally-xed position end sections of right andA left threaded sockets for engagin corresponding threads on said shank, a beve gear-wheel Xed on said shank adjacent to1 said central section and having square shoul,`l ders abutting thereagainst and against the' section, a rotary shaft'perpenrods and journaled in bearin s in said central sections and bevel gear-whee s adjacent end dicular to said wheels on said crank-shaft and movable platen, of a rod centrally connecting said sections having a ement respecbeinginlongiright and left threaded enga tively with the end sections an the combination with the crank-shaft and movable' platen, of aplucranks 'i and platen, each rod comprising three sections centrally connected by a threaded shank of lesser cross-section, the .central section of upon said shank in a'" thereon andthe,- said rod having respectivelyi4 on said shaft engaging with said bevel gears Shanks, whereby the rotation of said shaft will adjust the end sections of said rods, to be equa from the and gearthe combination with the connecting said crank and the platen formed in three sections, a shank of lesser cross-section tudinally-fixed relation to said central section, lsaid `three sections having square shoulders-V for abutting with each other and maintaining a full cross-section of the rod at all points therein when said shoulders albut an shims for insertion between said `shoulders when separated from eachother to `receive the compression stress and relieve thelsaime from the threads of. said shank.

8. In a press, the combination with the crank-shaft and movable platen, of a plurality of adjustable rods connecting the cranks and said platen, tween said rods perpendicular thereto having a geared connection therewith and a ratchet lever connected with said shaft for rotating the same to simultaneously and corres ondingly adjust said rods both above and elow isaid geared connecting-shaft.

' 9. In a -press, the combination with a crank-shaft and movable platen, of a plu- ',rality of adjustable rods connecting said platen and the cranks, a shaft extending between said rods perpendicular to and havin a gear connection therewith, a ratchet-whee on said shaft and a ratchet-leverhavin a reversible pawl, whereby said shaft may e rotated in either direction by said lever to corres ondingl and simultaneousl adjust said ro s both above and bellow saidy geared connecting-shaft.

In testimony in presence of two witnesses.

JOI-IN E. DOBSON. Witnesses:

H. C. SMITH, EDWARD D. AULT.

a shaft 'extending be- 5o whereof I affix my signature 

